Q42 / 49 · NTA Abhyas (JEE Main) 2020 · Physics · Magnetic Properties of Matter

A paramagnetic material shows a net magnetization of 8 A m-1 when placed in an external magnetic field of intensity  0.6 T  at a temperature of 4 K . When the same material is placed in an external magnetic field of intensity  0.2 T  at a temperature of  16 K , the magnetization will be

  • A
    323 A m-1
  • Correct answer
    B
    23 A m-1
  • C
    6 A m-1
  • D
    2.4 A m-1

Solution

According to Curie's law,

Magnetization, I∝Magnetic Induction(B)Absolute temperature(T)

⇒I2I1=B2T1B1T2

⇒I28=0.2×40.6×16

⇒I2=23 A m-1

Hence, the correct answer is option: 'B'.

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